MHT CET · Chemistry · Some Basic Concepts of Chemistry
What is the volume (in \(\mathrm{dm}^3\) ) occupied by \(75 \mathrm{~g}\) ethane at S.T.P.?
- A 60
- B 56
- C 22.4
- D 44.8
Answer & Solution
Correct Answer
(B) 56
Step-by-step Solution
Detailed explanation
Number of moles of ethane \(\left(\mathrm{C}_2 \mathrm{H}_6\right)=\frac{75}{30}=2.5\)
Volume of gas at S.T.P \(=\) moles \(\times 22.4 \mathrm{~L}\)
\(
\begin{aligned}
& =2.5 \times 22.4 \\
& =56 \mathrm{~L} \\
& =56 \mathrm{dm}^3 \\
& \left(1 \mathrm{~L}=1 \mathrm{dm}^3\right)
\end{aligned}
\)
Volume of gas at S.T.P \(=\) moles \(\times 22.4 \mathrm{~L}\)
\(
\begin{aligned}
& =2.5 \times 22.4 \\
& =56 \mathrm{~L} \\
& =56 \mathrm{dm}^3 \\
& \left(1 \mathrm{~L}=1 \mathrm{dm}^3\right)
\end{aligned}
\)
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